function openwindow(url,wname) {
	if (wname=='') {
		wname=url.replace(/[^a-z0-9_]/gi,'');
	}
	tmpwin=window.open(url,wname,'location=no,resizable=yes,status=no,directories=no,menubar=no,toolbar=no,scrollbars=yes,width=750,height=500,screenX='+(screen.availWidth-550)/2+',screenY='+(screen.availHeight-500)/2);
//	tmpwin=window.open(url,wname,'location=no,resizable=yes,status=no,directories=no,menubar=no,toolbar=no,scrollbars=yes,screenX=10,screenY=10,width='+(screen.availWidth-20)+',height='+(screen.availHeight-40));
	tmpwin.focus();
	return false;
}